CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Hilltop.	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit).	Deferred Compensation Employee Stock Trust, Net	Employee Stock Trust	Noncontrolling Interest	Total
Balance at Dec. 31, 2016	$ 1,870,509	$ 985	$ 1,572,877	$ 485	$ 295,568	$ 903	$ (309)	$ 4,011	$ 1,874,520
Balance (in shares) at Dec. 31, 2016		98,544,000					15,000
Increase (Decrease) in Stockholders' Equity
Net income	88,910				88,910			207	89,117
Other comprehensive income	1,627			1,627					1,627
Stock-based compensation expense	5,687		5,687						5,687
Common stock issued to board members	212		212						212
Common stock issued to board members (in shares)		7,000
Issuance of common stock related to share-based awards, net	(2,131)	$ 3	(2,134)						(2,131)
Issuance of common stock related to share-based awards, net (in shares)		244,000
Repurchase of common stock	(63,075)	$ (25)	(46,739)		(16,311)				(63,075)
Repurchase of common stock (in shares)		(2,462,000)
Dividends on common stock	(11,603)				(11,603)				(11,603)
Deferred compensation plan	3					(58)	$ 61		3
Deferred compensation plan (in shares)							(3,000)
Net cash distributed to noncontrolling interest								(1,304)	(1,304)
Balance at Jun. 30, 2017	1,890,139	$ 963	1,529,903	2,112	356,564	845	$ (248)	2,914	1,893,053
Balance (in shares) at Jun. 30, 2017		96,333,000					12,000
Balance at Dec. 31, 2017	1,912,081	$ 960	1,526,369	(394)	384,545	848	$ (247)	2,726	1,914,807
Balance (in shares) at Dec. 31, 2017		95,982,000					12,000
Increase (Decrease) in Stockholders' Equity
Net income	57,521				57,521			1,550	59,071
Other comprehensive income	(8,851)			(8,851)					(8,851)
Stock-based compensation expense	4,549		4,549						4,549
Common stock issued to board members	248		248						248
Common stock issued to board members (in shares)		10,000
Issuance of common stock related to share-based awards, net	(1,729)	$ 3	(1,732)						(1,729)
Issuance of common stock related to share-based awards, net (in shares)		281,000
Repurchase of common stock	(38,877)	$ (17)	(27,329)		(11,531)				$ (38,877)
Repurchase of common stock (in shares)		(1,702,000)							(1,702,696)
Dividends on common stock	(13,453)				(13,453)				$ (13,453)
Deferred compensation plan	4					9	$ (5)		4
Deferred compensation plan (in shares)							(1,000)
Adoption of accounting standards (Note 2)				(2,601)	2,601
Net cash distributed from noncontrolling interest								644	644
Balance at Jun. 30, 2018	$ 1,911,493	$ 946	$ 1,502,105	$ (11,846)	$ 419,683	$ 857	$ (252)	$ 4,920	$ 1,916,413
Balance (in shares) at Jun. 30, 2018		94,571,000					11,000